Phys. Rev. Lett. 81, 5113–5116 (1998)Positronic Water, Ps2OSee Also: Erratum
We demonstrate the chemical stability of a compound containing two positrons, Ps2O, which may be considered an extreme isotopic variant of ordinary water. We introduce a dynamical determination of the step length into the diffusion quantum Monte Carlo method, and find that Ps2O is more stable than its lowest dissociation threshold, PsO+Ps, by 1.27±0.08 eV. We estimate its annihilation rate to be 4.6ns-1. This paper is the first demonstration of the stability of a two-positron compound since Wheeler's work on diatomic positronium, Ps2 [Ann. N.Y. Acad. Sci. 48, 219 (1946)]. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.81.5113
DOI:
10.1103/PhysRevLett.81.5113
PACS:
36.10.Dr, 02.70.Lq, 03.65.Ge, 31.15.Ar
See AlsoErratum: Nan Jiang and D. M. Schrader, Erratum: Positronic Water, Ps2O [Phys. Rev. Lett. 81, 5113 (1998)], Phys. Rev. Lett. 82, 4735 (1999). |
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